<template>
  <div class="wrapper">
    <div class="box1">标题</div>
    <div class="lr"></div>
  </div>
</template>

<style>
	* {
	  margin: 0;
	  padding: 0;
    overflow-x: hidden;
	}
</style>

<style scoped>
.wrapper div {
  font-size: 20px;
}
.box1 {
  /* 750 * 20% */
  width: 1920px;
  height: 100px;

  background-color: coral;
  padding: 20px;
}

.lr{
  width: 350px;
  background: skyblue;
  height: 1920px;
}

</style>

